Home / 120,428.30-179,909.98-77,962.43

Finding the Fourth Proportional to 120,428.30, 179,909.98 and 77,962.43

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Solution

The fourth proportional to 120,428.30, 179,909.98 and 77,962.43 is: 116,469.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,428.30 : 179,909.98 = 77,962.43 : x
  2. Step 2: Convert to fraction form
    120,428.30/179,909.98 = 77,962.43/x
  3. Step 3: Cross multiply
    120,428.30x = 179,909.98 × 77,962.43
  4. Step 4: Simplify right side
    120,428.30x = 14,026,219,476.92
  5. Step 5: Solve for x
    x = 14,026,219,476.92/120,428.30
  6. Step 6: Final answer
    x = 116,469.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.